Self-playing violin.



J. WATBRS. SELF PLAYING VIOLIN.` APPLICATION FILED AUG. 1. 1908 Patented Feb. 20, 1912.

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J. WAUTERS.

SELF PLAYING VIOLIN.

APPLICATION FILED LUGA. 190s.

1,018.384; Patented Feb. 2o, 1912.

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` J. WAUTERS.y SELF PLAYING VIOLIN.

APPLICATION FILED AUG. 1, 1908.

Patented Feb. 20, 1912.

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l SELE PLAYING VIOLIN. APPLIGATIOH FILED Amm, 190s.

Patented Feb.2 0,1912.

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SELF PLAYING VIOLIN,

APPLIOATIOH FILED AUG. 1', 1908.

Patented Feb. 20, i912.

WAUTERS. Y SELF PLAYING VIOLIN.

APPLICIATIOI ILED AUG. 1. 190B.

Patented Feb.20,1912.

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J. WAUTERS; SELF PLAYING VIOLIN. APPLICATION FILED LUG. 1, 190e.

. 1,018,384, v Patented Feb. 20, 1912.v

Y SHBETSWBHHHTV` UNiTED s'rATns PATENT OFFICE.

JOSEPH WAUTERS, OF BINGHAMTON, NEW YORK, ASSIGNOR T THE RUDOLPH WUR- 'LITZER MANUFACTURING COMPANY, 0F NOR-TH TONAWAND-A, NEW YORK, A .CDR-

PORATION OF NEW YORK.

SELF-PLAYING VIOLIN.

Specification o f Letters Patent- Patcnted Feb. 20, 1912.

Application filed August 1, 190B. Serial No. 446,397.

To all whom 'it may concern.'

Bc it known that l. .Tosnrn Wiw'l'mis, a .subject ot the King' ot Belgium` residing' at Binghamton. in the county ot Broome and State ot' Non' York. have invented certain neuand useful lmprorements in Self-Playing' Violins.y ot which the. following is a specification.

The invention relates to mtahanically played n'uisieal instruments. and more particularly to instruments of the violin class.

An il'iiportant. object o't the invention is to provide simple and comjlpiact fingering mechanism arranged to act directly upon the violin strings and capable of perforulingl the required. functions in relation thereto.

Another object of importance is to provide improved bowing mechanism which shall .acton the strings with delicacy and feeling.

Other objects of the invention are provisions for imprinted and simply. connected tuninp` means. devicesl for automatifally producing the variations in force indicated hy the term cxpression`. means 'for pro-- nut-ing' tren'iolo or shake effects, an improrcf i music-sheet and connections thereom through the tradier-board. means for v rai-ying the time, improved driving mechanis-n1 ttor the apparatus.l and. generally to provide mcclmnically operated means Whereoy the m rai etfects produced by skilful hand playiiiig uw successfully imitated.

The inventan: crnisists in certain novel features. and deta of construction and arrangement by whit the ahora objects are attained. to he hereinafter described.

The accompanying drauf'ings form a partoiE this specification and show the invention as it. has been carried out in practice.

Figure l a t'ront elevation of the instrument with the music-roll or sheet exposed. Fig. 2 isa corresponding back View with portions of the case removed. to show the mechanism. The remaining figures areon larger and varying scales showing portions of the mechanism and cert-ain details. Fig. 3 is a horizontal section, partly in plan View, showing the driving mechanism.. 'Fig 4 is a. corresponding rear elevation. Fig. 5 is a front elevation showing the fingering means. Fig. 6 is a Vertical section of the same portion of the instrument, taken on the line 6-6 in Fic. i. I"g.7 is a corresponding horizontal ior: on the line 7--7 in Fig. 6.

Fig. S is an elevation of a portion of one View with one of the side plates of the bowleier remoti-fed, and partly in horizontal seetion. Fig. 10 is an elevation showing an attachment for supplying resin. Fig. 11 is a horizontal section through the expression device. Fig. 12 is a transverse section of the same, taken on the line 1.2--12 in Fig. 1l.. F ig. 13 is a verti'al longitudinal section of the same parts. Fig. 14 is a horizontal section through the tuning device, the plane of section beingr indicated by the line l-L-li in the succeeding figure. F 15 is a tert-ical section partly in diagrammatic elevation, showing, the tuning device and its connections, the' plane of section being the line 15-15 in Fig. let. Fig. 1G is a face View oi a portion of the mimic-sheet or roll. Fig. 17 is a longitudinal vertical section, partly in elevatiom'showing a portion of the tracker-hoard and its connected tubes. Fig. 1S isv a diagram showing the arrangement of the pneumatic connections for act-uat-ing the several mechanisms.

Similar letters of reference .indicate the same parts in all the igures.

A is the lower portion of a Vertical casing containing` a motor 'Pi driving the shaftf B1 of a' pneumatic pump BE by 'which'air is exhausted and a 'partial vacuum maintained in a main reservoir ii* connected by pipesl through a scoi'id-ary reservoir Bi' to the several pneumatics by which thc desired movements are initiated or controlled through connecting` tubes from the trackerboard B, the apertures of which are con- BG arranged to register ,with such apertures as the sheet. is fed across the tracker-board. The pneumatics may be understood to he of any ordinary or approved construction 'adapted for this class of service.

On the fronty of the upper portion A1 of the casing is a vertical. sounding-board A? to which the violin M is secured -by adjustable clamps A3. In rear of the soundingboard are various mechanical devices by which the severalfmovements are produced, operated from a main shaft C extending from front to rear at one side, and 'driven `througagh a belt or chain C1 by the pumpshaft B1.

The strings of the violin are vibrated by bows TD5 one for each string, constructed of the hows. Fig. 9 is a corresponding plan l roo mainly as shown a patent to me dated.

outer end a vibrator-disk "D1, preferably of glass, rotated by 'a narrowbelt D2 running on idlers- D1 between the two plates forming the bow or lever, from a pulley on a shaft 1n the inner end vof t e" lever, carrying a fric 'l tion-'disk D1, to a pulley D1s on the shaft D l'of the vibrator-disk D1. Motion isximparted to the friction-disks D4 through a train of connections from the main-shaft C. On the rearA end of the latter is a friction-plate()2 against the rear face of which lies the :periphery of a friction-wheel C* on a laterally extending horizontal shaft C1 mounted to slide axially in its bearings to move the will be described.

point of 4contact of the frictionwheel nearer I to or farther from the axial line of the shaft C for varying the speed of the shaft C1 as C5 is a sleeve splined on the shaft C3 to revolve therewith but permitthe latter to slide `therethrough. It is held in fixed position by a wheel C6 thereon .having a Vgroove in its periphery in which is Vengaged a fixed* fork or yoke A1 secured to the floor A5: of

ythe upper portion of the casing. The sleeve above formed on a vertical bracket or-standard A, Above the pulley E1 are two pulleys .E2 E1 on which run horizontal belts VE1 5 respectively to corresponding pulleys F1 `F1 on .vertical shafts F F1 each of which car.-

ries friction wheels F* F1 in the same planes with the frictiomdisks D* D" and. adapted torotate them when the latter are brought into contact Withqsuch friction-Wheels by the,`

- swing of the bow-levers. VThe levers are `thus swung by cords D7 attached to theinner f ends of the levers and running over idle oper' leading pulleys D8. to pneumatics D9 ated through tubes and connecting devices from 'the tracker-board B5 as will be described. Springs D111 joining opposite pairs of levers tend to return the levers and hold the friction-disks D1 D4 out of contact with the wheels F* F* when the strings vibrated by thel respective bows are to besilent. Thel levers are so proportioned and hung as vto present the yielding friction-disks D1 to their friction-wheelsFf a little in advance -V of contact'with the strings, thus insuring. proper rotary motion to the vibrator-disks at such contact. i Adjustment for this purpose is afforded by mounting the pivots d d 1n 'plates A secured to the vframlng A? by `screws extending through slots'ain such plates and permltting the latter to be swung pivotally by wires D11 D11 extending from the forward ends of the plates 'through the' sides of the case A1 and receiving nuts D12 on their projecting threaded ends. The nuts are grooved peripherally and held by the engagement of fixed collars A in such grooves, so that by turning the nuts the plates and connected levers are moved laterally. Similar wires D13 extending rearwardly through the back of thecasing A1 receive similar nuts D11 by which the plates may be adjusted toward the front or rear as required.

It is important that the contact of the vibrator-disk and string be exceedingly delicate and that the greater pressure due to further movement of the lever be capable of nice adjustment. This is effected by mounting the shaft D of the vibrator-disk in a swinging vframe D15 pivoted at d1 in the lever and limited in the extent of its swing by curved slots 'd2 d2 receiving flanged antifriction rollers D16 in which the shaft D6 is journaled.,` A spring D17 on the frame exerts its force in theA direction to hold `the vibrator-disk toward the string, and the tension of the spring is adjusted by turning a button D1s to which one end of the spring is attached, in the 'direction to tighten or relax the spring. The button is.held in the desired position by the engagement of the point of a screw D19 in the lever with one of the depressions or recesses d3 in the adjacent face of the button, as shown in Figs. 8 and .-As it is preferable that the vibrator-disks on one side of the violin revolve in an opposite direction' to th'ose on the other side, the shafts F and F1 are rotated'in opposite di-A rections by employing the open belt E1 on the pulleys E2 and F2 for the shaft F, and

"the crossed belt E54 on the pulleys E3 and F 3 for the other shaft.

The sliding-shaft C3 is automatically moved to vary its rate of revolution by a vertically mounted shifting lever G 'fulcrumed at g on a standard A1". and having a `fork G1" "atvthe lower end in which rotates a collar C9 on the shaft; the upper end of the shifting lever is cdnnected by a link .G2 to a crank arm orpin adjustably mounted in a radial slot g1 in. a lgear-vvheel G3 which is rotated in either direction by the engagement therewith of the teeth on oppositely rotated pinions Gr4 G5 carried in a tilting yoke or frame G pivoted at g2 in a vertical bracket A11. Motion is imparted to the pinions by a belt running on a pulley C10 on the shaft @Sand a `pulley Gr8 on the yoke G above. Mounted on the same. shaft as the pulley GS is a geariwheel G9 in mesh on one side with the pinion G4 and onthe other with an intermediate gear Gr1o meshing with. the other pinion Gr5 on .the other side and serving to Arotate it in the opposite direction. From the ends of the. frame Gr extend cords G11 and G1? each connected to a pneumatic G13 operated by a tube from the tracker-board. Normally thefraine G5 occupies a middle position :with both pinions (if4 and G5 out of mesh `with the gear-wheel G3, and the shaft tends vto maintain a uniform rate in whatever position 'its/friction-wheel happens to be relatively lto the friction-plate, but a Apull on the cord from one of the pneumatics tilts the frame and throws the corresponding pinion into mesh causing the gear-*wheel to malte a partial revolution and,- tln'ough the link Grgk and lever G,'shift the shaft C:i to a new position and induce a corresponding change in velocity of rotation and similarly increase or diminish the speed of the vibrator disks D1.

H is a shaft extendi-.g t Tansrersely of the casing parallel with the shaft C and arranged like the latter to slide in its bearings. It carries a friction-wheel H1 at one end in contact with the front face of the friction-plate C2 on thel main shaft C and serves in driving the feeding and re-winding mechanism for the music-sheet B6,

which mechanism is oniy partially represented but may be understood to he of the usual or any appro-ved. construction. `A sprocket wheel H2 on the l-l tlnough a` lsprocket chain H5 drives the inusicsheet mechanism, and a collar H" on the saine shaft is engaged by a fork #Y on a lever HG fulcrumed at k whereby the shaft may be `moved. axially to vary the speed through a link IlI to an arin HS on a rock-shaft H extending forwardly through the 'casing A and carrying on its projecting end an index finger H10 by which the rocltlshaft. may be partially rotated to accelerate or re 'd.the speed of the music-sheet and thus ary the time. The index finger is l'irovided with a scale I 11 and designating marks and words. as Moderata Allegro,. and Vivace to aid in locating the index to produce the required rate.

The fingering mechanism is supported on tubular studs A A712 extending through openings in the sounding-board and firmly fixed in a portion of the framing A13 in rear thereof. In'the hollow studs are received.

` violin is partially inclosed as shown in Fifr.

5, 6 and 7. Through the face of the ridge I6 extendfour series of sliding pins or fingers I Is I7 IS arranged in vertical rows: one for each string. The fingers Is of the inner rows are longer and project farther forward than those of the outer rows IT and all are equipped with collars l and helical springs Il?! abutting -atone end against the collars andi, at the other against face of the ridge and serving to hold the fingers normally away from the violin strings. The fingers are depressed to close the strings by four series of levers I11 arranged in two banks 4on each side, fulcrumed on studs Il? projecting from the board 15 Awith their inner ends in position to strike the heads of the fingers. On the outer ends of the levers are sockets I13 in which are received the ends of thrust'rods Ilr extending through the board and connected to arms on the pneumatics I in rear of the latter, by which thel rods are thrust forward to oscillate the levers Ill and depress the fingers I7 I8 and thus'engage the strings of the violin at the proper points as selected by the inusic-sheet and tracker-board, from which latter extend tubes to the pneumatics Il?. Thefingers are` so spaced in the board I5 as to produce the required tones and half-tones of each string. l

By loosening the screws I2 the frame I1 and its board may be moved forward sufficiently to free 'the thrust-rods I from the hoard which latter may then be swung on hinge to permit the removaland introduction of the violin, and access thereto for inspection or repairs, such as the renewal of the strings. The inner series of levers I11 are shorter than the outer and lie immediately behind them but sufficiently separated therefrom to permit 'free operation of either without interference with the other. This arrangement. `allows the fingersI to be properly arranged `with the required compactness to produce the tones and halftones inthe limited space offered by the violin linger-board; and to be easily and directly operated by the pneumatics 115.

Il are strips or bars faced with felt and serving as stops to receive the levers noiselessly the latter are returned -to their positions of. rest, and I is an openworkplate of metal inclosing the levers and serving as an ornamental face. for the fingering mechanism, i'tl 'is supported by. studs, not shown,

`from the board I5.

In order to closeI the strings with` the saine. soft yielding qualities offered hy the human finger tips. l interpose between each string' and series of fingers. a strip of soft vulcanized rubber .l extending parallel `ith but ont of vcontact with the string; the finger when forced down contacts first with the rubber strip' and presses the latter against the string, the effect being closely y aperture in the tracker-board B5.

analogous to.` that produced by the finger tips. `The strips are held in clamps J1 and J1 secured to the upper and lower edges of the strip I16 and are held under slight .tension. Slurring is produced` by depressing the lingers inf` series in rapid succession, the tone due to the Y' depression of one finger owing smoothly into that induced by the next, by reason of the` action of the soft rubber strip. y

The violin M is of the usual type and the mechanism is designed to play any such instrument of standard size, thus permitting a favorite violin to be placed in position and played Without alteration or damage, and tuned while in place by turning the pegs with which itis equipped, the head of the violin being easily accessible for that purpose.

To aid in tuning I employ the device illustrated in detail in Figs. 14C and 15.

K is a box divided by a longitudinal partition K1 into a single closed compartment K2 on one sideand by the additional transverse partitionsK" K `into four cells K4 K4 on the other; in each of the cells is a reed or pitchpipe K5, one for each string, conditioned to emit the note corresponding to its string at the desired pitch. Each pitchpipc is closed by a valve KG in the common compartment K2 from which air is exhausted through a pipe I? leading to the reservoir, and in the rear wall ofthe box are L-shaped passages It' c each extending to the top of such wall 'and opening on its rear face whereit is normally closed by an air-valve KT; at the top of the wall each passage receives a T K8 from one branch of which a tube extends to the bow-pneumatic D9 and from the other a tube to the bow-operating A pushbutton K9 for each pitchpipe is exposed on the front of the casing A `at a convenient point, as shown in Fig. 1, from which extends a rod or Wire K1 through the parti,- tion K1 to its valve K, and immediately behind the reed-valve but slightly separated therefrom is a similar rod `or wire K11 exthe corresponding string and causing it toV sound; if se tones emitted by the pitchpipe and string are not in unison the string is tightened or loosened until the desired coincidence is attained. When the pushbutton` is released the valves again close sheet pass unobstructedly through the branches of the T Ks and are unaffected by vor therefrom and dividing the interior of the chest into three compartments L3, L* and L5; the end compartment L3 `is connected by a pipe X1 .to the reservoir, thel lower compartment Lby a T-connection L6 and exhaust pipes to the bow-pneumatics, andl the upper compartment L5 by a pipe X2 to the reservoir. An opening Z in the partition L1 controlledby a valve L7 affords communication under certain circumstances to be explained, from the lower compartment L4 to the end compartment L3. The deck L2 has an attenuated longitudinally extending triangular opening Z1 therethrough and is provided with a close itting slide L? having a similar but reversed opening Z2 therein and moved longitudinally of the deck, in opposition to a spring, by a wire L9 extending through the end of the chest and connected bya cord L10 to a pin on the gear-wheel' vthe speed ycontrollingvmechanism above described. A long slot Z3 downwardly therethrough from the slide and protruding suiii'ciently to strike at one end of the slide-movement against the upper arm of avertical lever L12 mounted in the lower' compartment L4; the lower arm of the lever is connected to a thrust-rod L13 arranged to open the valve L7. M1 'is the bridge. N* are pneumatics adapted to be controlled by the music sheet for tremolo purposes when desired.. The' operation of this portion of the apparatus will be explained further on in this description.

A. regulator on the lupper end of the shaft E" performs a function similar to that of a fly-wheel in opposing sudden changes of speed and 'absorbing shocks in the vdriving mechanism, but is constructed to allow changes of speed, as is required in mechanism of this character, to take place with greater rapidity than is allowed by a ilywheel. It consists of a collar E fixed on the shaft, connected by lat springs E7 to a sleeve E3 free to slide vertically on the shaft as the springs are expanded and straightened, and balls or weights E9 attached one toeach spring at about the mid-length of the latter. The revolutions of the shaft cause the balls to separate by centrifugal force and revolve with: the shaft at a distance from the axial line thereof, and as theii` speed of travel increases with the distance from such axis their inertia aided by the resistance offered'. by the air tends to resist further acceleration, while their momentum tends tofmaintain'the rate.Y This sensitive 'quality is oit iniportance in mechanism of this character in which a balance is re-.

quired whichshall allowmore-rapid changes than are afforded by the. usual fly-Wheel.

O (i) are tightening pulleys carried on the inner ends ci rods O1 Ol serving to 4take up an).y slavi; in the cords D7 andv Dby which. the lara-levers are moved; they are operated by nuts t)2 0"" bearing against. the soundingboard. on the projecting screw-threaded ends of the rods at each side of the opening c.

Resin applied to the peripheries ot -the 'vibrator-disks by an attachment shown in Figs. 9 and l0 and consisting oi. a dat spring R having at one end a clamp R1 by which it is held on the bmw-lever I), and at the other a pair of jaws R2 in which a small block of resin R3 is received. Theresin is presented with lighty'ielding forceI to the periphery.T of the vibrator-disk, when the latter is forced voutwardly by contact with its string,v

the tension of the spring being adjusted by varying the position in which its clamp is fastened. to the bow-lever.

It Vis sometimes necessary for one or lmore of the bows to be held in contactl with its string for considerable continuous periods,

which in the usual methods of perforation' would require long slits in the music-.sheet-,: tending to 'weaken the llatter and render it unmanageable 'by the feedingA mechanism; to overcome this dithcultyr and permit :cpi:- tinuous Contact of the `vibrator-disks vittiout weakening the sheet, 'the arrange nent-1 illustrated in 'Figv l and 117 isintroduced.

i Each vvibrator-disk is represented by two openings .in `the tracker-board B5 from' which extend tubes S S .joined below to the branches of a T S1 from the stemot which extends a single bow-controlling tube 52;'

andthe sheet B6 is "formed Withtwo rows of perfor-ations b, b1 each matchingto one-of suoli apertures. Theseperforations may be individuallyof-moderate'length so arranged that'the perforation b1 will open 'its trackerboardaperture' at vthe instant,or a little before the perforation 1b ofthe other series has -closed its aperture, thus supplying air-:to

the .tube S2-continuously throughthe tubes S S alternately. lTo further strengthen the sheet the seriesofperforations b1 arenot formed side by 'sidebut are separated "by a line ofvper'foivation-s controlling otlierilevices or portions ofthev playing mechanism. As shown in-Fig. '1G the outer perfor-ations l) on feach margin of the sheet lead to a bow aperture, the next series 6210- control the soft and loud expression devices through the tubes T and '1" respectively; the next in.- nerf'series on eachv side are the bow perforations b1 b1 for' thesame bows, the :next ffb control the trcmolo devices for two strings through tubes U U, the next b b control one ofthe next pair of bow apertures, separated by another tremolo series Zi 'b3 from the4 other bow series 1 bi, the remaining rows rb4 b4 in the sheet operate the fingering devices through tubes V V from the trackerboard.

In the diagram Fig. 18 the connections from the tracker-board are illustrated. The pump-reservoir B3 is connected by a pipe W to the secondary reservoir B'1 in both of which a partial vacuum is maintained by the pump; from the secondary reservoir suction pipes T1 Vl lead to the fingering pneumatics Il5 which are actuated through the tubes V V from the tracker-board. The expression pneuniatic-.s G1 if are actuated through the tracker-board tubes T T 1 and the tremolo pneumatcs N4 through the tubes U U; a pipe VW to thesecondary reservoir' exhausts from these. The air connections from the tracker-board to the' bow pneu- .matics D is through the tuning device K, the tubes S2 S2 'lead to the Ts on the tuning-box and thence to the pneumatics, the passage being in ertl'ect continuous exceptwhen the push 'buttons K are operated and open the valves Ki to vsound the pitchpi-pes. From the pneumatics D the exhaust is through the expression-chest L by the pipes X1 and X2 leading therefrom to the pump or main reservoir Ba and secondary reservoir B4 respectively.

The force with lWhich the disks D1 Will be presented to the strings is controlled by the triangular openings in the slide ILS and deck L2. The movement of the slide-relatively to the deck varies the size of the opening, short movements producing comparat-ively great variations by reason ofthe shapes of the openings, and, through vthe connection L10 'to the speed regulating ,mechanisnn is arranged to'be lessened when .tion of a slight opening Aretards the transmission of Aair pressure from the lower coinpartnient L* to the -upper L5 and induces light contact between the disks and strings, buta movement of the slide L to enlarge the opening permits rapid equalization of pressure and the disks are presented with corresponding force. A still further movenient of the slide to produce full opening raises the valve L7 in the end compartment `L3, through the, action of the pin L and lover L12, and afford-s direct cominunication -throu h t'lleplpe X1 to the pump reservoir.

`in 'a dition 4to that already established through the pipe X2 to the secondary reservoir and presents the disks with full pressure against the strings, producing the loudl strong tones required in sudden forte passages.

A pipe P from the secondary reservoir to the tuning box maintains the desired partial `vacuum therein and a pipe l/V2 from the tremolo and speed controlling pneumatics performs a similar function for these parts.

`G14 is a spring pawl engaging the teeth of the gear-Wheel Gr3 and serving to prevent its movement when not rotated by one or the other of the pinions G4 G5. It is Withdrawn to release the gear-Wheel b a cord Gl5 attached thereto and to a ring Gm; to the latter are also attached the ends of 'cords G1T G17 running through eyes G18 on the pneumatics G13 and thence to the ends of the yoke Ge Where they are fastened. The collapse of either of the pneumatics G13 pulls its cord (Pfand swings the yoke, at

the same time releasing the gear-wheel by withdrawing theY paWl Gn. This arrangement may be used instead of the direct acting cords G12 or may be used in conjunction with the latter as shown.

It will be noted that all the operations including the modulations of speed and force under the term expression are performed automatically through the music-sheet.

The bowing devices are constructed to provide the desired delicate contact with the strings and are automatically actuated.

The arrangement of the fingering mechanism permits practically direct action from the pneumatics to the finger-board.

The rubber strips supply the required soft but firm' touch required, and the fingering mechanism is compact and Simple in construction and operation and may be easily swung aside-to permit access to the violin.

The mechanism for varying the tempo is easily operated and noiseless, and the tuning devices are simple andare introduced in the bowing system in such manner asto be always ready for service Without'interference with such system or requiring any movement of valve or controlling devices other than those actuated by the push-buttons.

The construction and arrangement do not require a specially designed instrument;

any violin of standard size may be played, and the tones are not muflled by mechanism inclosing or touching the violin; all playing parts forward of`the soundingboard are supported by the main framing independently of such board, thus permitlting, the latter to carry the violin alone and respond to its vibrations.

Modifications may be madein the forms, proportions and arrangements of the several devices Within Wide limits without departing -from the rinciple of the invention, and 4parts may .e used without the whole.

Althoughthe apparatus is shown and described as o era'ting in conjunction with a violin, it will be understood that any instrument of the violin type may be performed upon, or parts of the lnvention may be employed for mechanically playing upon instruments of other types or for other pur- .l

poses.

Parts herein shown and described but not claimed are to be made the subject matter of separate applications, one of which is already filed under Serial No.,621,201.

I claim .1. In an instrument of the violin type, a string, means for varying the length of the note-producing portion of the string, and a strip of. material extending longitudinally of said string between the latter and said string-varying means.

2. In an instrument ofthe violin type, a string, fingering means therefor, and a stri of resilient material extending longitudinally of said string between the latter and said lingering means. v

3. In a violin player,'a string, a fingerboard, fingering means constructed to close said string against said finger-board at various points in its length, and a strip of rubber extending longitudinally of said string between the latter and said fingering means.

4. In a violin player, a violin, fingering means for the strings thereof, and strips of resilient material extended longitudinally of said strings between the latter and said fingering means.

5. In a violin player, a violin, lingerin means consisting of a series of pins for eacl st.ring thereof and means for pressing said pins against said strings, and strips of rubber extended. longitudinally of said strings.

between the latter and said pins.

6. In a violin player, a violin, a series of fingers for each string thereof, aseries of pivotally mounted vlevers for actuating said fingers, a seriesof pneumatica, and means actuated from, said pneumatics and loosely engaging said leversfor moving the latter,

7. In a violin player, a violin, a series of fingering pins for each string thereof, the pins for the inner strings longer than those for the outer strings, aseres of "pivotallymounted levers contacting with each series of pins, the levers for said long pins longer than the levers for the short pins, said levers being separate from said pins,A a series of pneumatics for each series of levers, and thrust-rods from said pneumatics to'said lovers.

8. In a violinpla'yer, a violin, a fingering devicel comprising a plurality of pins and levers for eachfstring of said violin, and supports for said fingering device, said supports bein slidably mounted for movement in a directlon parallel with the length of the pinsv whereby the fingering device maybe los for detachably mounting said fingering deexten sounding-board, and means for varylng the said board, and sliding supports for said v and permit the latter to be swun 'vice' whereby it may be removed when de- 4sired.

9. In a, violin player, a violin, a soundingboard on which said violin is mounted, a frame in rear of said sounding-board and out 0f Contact therewith, a fingering device, slidin -sup orts for said fingering device ging rom said frame through said lengths'A of said supports to adjust said fingerin device relatively to the strings of said vio in.

10. In a v iolin player, a support for a violin, a frame inclosing the' inger-board thereof, a board hinged to said frame and* carrying -a fingering device, operating rods for said ngerlng device extending through frame, whereby saidframe, board and {ingering device may be moved on said sliding supports to free said rods from said board onv its hinge and permit access' to said v io in.Y

11.` In a violin player, a sounding-board, a violin mounted thereon, a frame inelosin the finger-board of said Violin, a boar hinged to said frame and carrying a finger; ing device, operating rods for said fingen ing device extending through openings in saidsoundingboard, a fixed support in rear of said sounding-board and outl of Contact therewith, and tubular studs and rods arranged to slide telescopically one within the other extending from said fixed support t0 said frame and carrying the latter.

12. In a Violin pla er, a tingerinfl 'device comprising a series ol fingers for eeel lstring of said violin, a series of levers for alctuating said fingers, a board supporting said fingering device, a clamp at each end of said board, and a series of stripsof rubber `extended longitudinally of the said violin strings between the latter and said fingers and held by said clamps. 1 1 0 In testimony that I claim the mvention above set forth I am): my signature, in presence of two witnesses. y

- JOSEPH WAUTERS. Witnesses: 1

NINA WAfrRoUs, t HARRY C. WALKER. 

